How about not every addition has to be an uber-performing late war American plane? It was WORLD War II you know.
That's my point. I really do want all of 'em. I even want the TBD Devastator - an airplane that had a significant impact on the war in the Pacific, even as it was shot down in droves. Let's face it, it's not as much fun if all we have is 425 mph cannon-armed single-seaters.
At the same time, priority-wise, I'd think an Italian bomber (probably the SIAI MArchetti 79), the He111, the Japanese G4M, the 410, and the Beaufighter are all more significant.
But, I wouldn't turn down the addition.
As for American planes... meh... don't like 'em much, though I appreciate the flat trajectories of their .50s.